Changes to List all groups

added the enum value metadata to the property items/ of the query request parameter fields

added the optional property items/metadata to the response with the 200 status

the response's body type changed from no type to array for status 200

the response's body type changed from array to no type for status 200

added the new PAY_GROUP enum value to the items/type response property for the response status 200

added the enum value next_paid_at to the property items/ of the query request parameter fields

added the enum value pay_frequency to the property items/ of the query request parameter fields

added the optional property items/next_paid_at to the response with the 200 status

added the optional property items/pay_frequency to the response with the 200 status